1820328552 has 96 divisors (see below), whose sum is σ = 5843073600. Its totient is φ = 520089984.

The previous prime is 1820328551. The next prime is 1820328581. The reversal of 1820328552 is 2558230281.

1820328552 is a `hidden beast` number, since 1 + 82 + 0 + 3 + 28 + 552 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1820328551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53277 + ... + 80492.

It is an arithmetic number, because the mean of its divisors is an integer number (60865350).

Almost surely, 2^1820328552 is an apocalyptic number.

1820328552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1820328552 is an abundant number, since it is smaller than the sum of its proper divisors (4022745048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1820328552 is a wasteful number, since it uses less digits than its factorization.

1820328552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133797 (or 133781 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 1820328552 is about 42665.3085304677. The cubic root of 1820328552 is about 1221.0026139552.

The spelling of 1820328552 in words is "one billion, eight hundred twenty million, three hundred twenty-eight thousand, five hundred fifty-two".